This doesn't make any sense, unless the variants directly compete against each other. But what we've seen with Omicron is that it can infect someone who just h

This doesn't make any sense, unless the variants directly compete against each other. But what we've seen with Omicron is that it can infect someone who just had Delta. So if there's a mutation that can infect someone that had Omicron, but is more severe that mutation can flourish, even if it is less transmissible than Omicron. It just flourishes in parallel.